I apologize if this is a FAQ; honestly I did search for a while....
I would like to learn more about basic acoustics of earmolds, and the effects of adding dampers and ports. I have tried some basic experiments with knowles dampers and drilling ports, but I really don't know what I'm doing.
My specific issue today is a custom silicone earmold for my bluetooth headset. The headset was not designed to have such a tight acoustic seal, and so it is both loud and a bit bass heavy (basic occlusion effect). I have drilled a small port, which helps with the exaggerated bass effect, and have added a knowles damper, which brought down the volume. But I am basically just stabbing in the dark, trial by error. A bit more knowledge would be very helpful.
More generally, I have custom silicone earmolds for a few different IEM I own, and, if I become more knowledgeable, may try to tweak them.
So can anyone help? I am an electrical engineer and knowledgeable about basic sound and acoustics. But would rather avoid solving differential equations, if it can be avoided :-)